from typing import Any
from psycopg.rows import Row
from .s0_base import *
from .change_set import ChangeSet
from .utility import *


def add_pump(name: str, id: str, node1: str, node2: str) -> ChangeSet:
    if not is_node(name, node1):
        return ChangeSet()
    if not is_node(name, node2):
        return ChangeSet()
    if node1 == node2:
        return ChangeSet()

    sql = f"insert into pumps (id, node1, node2) values ('{id}', '{node1}', '{node2}');"
    undo_sql = f'delete from pumps where id = "{id}";'
    return add_link(name, PUMP, id, sql, undo_sql)


def _get_pump(name: str, id: str) -> Row | None:
    return query(name, f"select node1, node2 from pumps where id = '{id}'")


def delete_pump(name: str, id: str) -> ChangeSet:
    if not is_pump(name, id):
        return ChangeSet()

    row = _get_pump(name, id)
    if row == None:
        return ChangeSet()

    node1, node2 = row['node1'], row['node2']

    sql = f"delete from pumps where id = '{id}';"
    undo_sql = f'insert into pumps (id, node1, node2) values ("{id}", "{node1}", "{node2}");'

    return delete_link(name, PUMP, id, sql, undo_sql)


def _get_pump_node1(name: str, id: str) -> str | None:
    row = _get_pump(name, id)
    return row['node1'] if row != None else None


def _get_pump_node2(name: str, id: str) -> str | None:
    row = _get_pump(name, id)
    return row['node2'] if row != None else None


def _set_pump(name: str, id: str, key: str, key_type: str, value: str, optional: bool = False) -> ChangeSet:
    if not is_pump(name, id):
        return ChangeSet()

    row = _get_pump(name, id)
    if row == None:
        return ChangeSet()

    return update(name, PUMP, 'pumps', 'id', id, key, key_type, row[key], value, optional)


def set_pump_node1(name: str, id: str, node1: str) -> ChangeSet:
    if not is_node(name, node1):
        return ChangeSet()
    if _get_pump_node2(name, id) == node1:
        return ChangeSet()

    return _set_pump(name, id, 'node1', 'str', str(node1))


def set_pump_node2(name: str, id: str, node2: str) -> ChangeSet:
    if not is_node(name, node2):
        return ChangeSet()
    if _get_pump_node1(name, id) == node2:
        return ChangeSet()

    return _set_pump(name, id, 'node2', 'str', str(node2))


def set_pump_power(name: str, id: str) -> ChangeSet: pass
def set_pump_speed(name: str, id: str) -> ChangeSet: pass
def set_pump_head(name: str, id: str) -> ChangeSet: pass
def set_pump_pattern(name: str, id: str) -> ChangeSet: pass


def get_pump_property_names(name: str) -> list[str]:
    return ['node1', 'node2']


def get_pump_properties(name: str, id: str) -> dict[str, Any] | None:
    row = _get_pump(name, id)
    if row == None:
        return None

    ps: dict[str, str] = {}
    ps['node1'] = row['node1'] if row != None else None
    ps['node2'] = row['node2'] if row != None else None
    return ps